Combination punch for nonmetallic washers



March 1o, 1942.

A C. L. HALMRAST y COMBINATION PUNCH FOR NON-METALLIC WASHERS Filed- Oct. 2l, 1940 fn Ven I ora @dA/MWL lmy. 2

Patented Mar. 10, 1942 ooMINATIoN PUNCH Fon NoNMETALLIc WAsHERs Carl L. Halmrast, Vancouver, British Columbia,

Canada l Application October 21, 1940, Serial No. 362,096

4 Claims.

My invention relates to improvements in a combination punch for cutting Washers out of strips of non-metallic materials, and the object of my improvements are, first, to facilitate cutting said washers rapidly with a spontaneous stripping action. ejecting washers clear of said punch; second, to render the punch simple in construction with the several parts readily accessible for inspection or repair; and third, to adapt the machine to better perform `the functions required of it.

I attain these objects by the `mechanism illustrated in the accompanying drawing, in which:

Figure l shows a side elevation of a hand press with the improved combination punchset in position; Fig, 2 shows a sectional elevation of the improved combination punch in the cutting position;` Fig. 3 shows a sectional elevation of improved combination punch in rst position of ejecting action; Fig. 4 shows a sectional elevation of improved combination punch in final positionof ejecting action; Fig. 5 shows an isometric view lof resulting washer.

Similar numerals refer to similar parts throughout the several views.

"main ejector barrel I0, allow same to travel a limited distance up or down. Center hole ejector II is threaded into cap I2. A coil spring I3 is wound around center hole ejector II, and sits in a groove provided in under part of cap I2,

. and in a groove provided in collar I4, which rides on heads of main ejector guides 9.

The operation of the punch is as follows:

When handle 2 is brought to the downposition the punch parts will be positioned as in Fig. 2. `Main cutting portion I and center hole cutting portion 8 sever the material. The washer produced clings to punch. On the upward stroke Fig. 3, cap I2 contacts stop rod 5, which compresses coil spring I3. At the same time center hole ejector II travels downward and protrudes beyond center hole cutting portion 8, and forces out clinging waste in center hole. As the handle 2 advances further upwards Fig. 4, more pressure is exerted on cap I2, by stop rod 5. Cap I2 compressing coil spring I3, presses on collar I4, which forces down main ejector guides `lLwhich are attached to the main ejector barrel I0, which travels down and protrudes beyond main cutting portion l, thus forcing out washer as shown in Fig. 5. On down-stroke return, the pressure on the spring I3 is released allowing the spring to expand and raise ejector II while the parts ID, 9 and I4 are raised by the material being cut when the cutter 'I starts its cutting action.

I claim:

l. A punch of the character described comprising a slidable head, a cutter secured to the lower end of said head, a second cutter coaxial with said rst cutter and connected thereto, a center ejector member, a second ejector member between said cutters, and means between said ejector members for successively operating the same upon reciprocation of said head.

2. A punch of the character described comprising a slidable head, a cutter secured to the l lowerend of said head, a second cutter coaxial with said iirst cutter and connected thereto, a

between said cutters, a stop above the upper end of said center ejector member adapted to depress said` member upon upward movement of said head, and means between the upper end of said central ejector member and said second ejector member for depressing said second ejector member subsequent to the operation of the central ejector member. j

3. A punch of the character described comprising a slidable head, a cutter secured to the lower end of said, head, a second cutter coaxial with said rst cutter and connected thereto, a center ejector member, a second ejector member between said cutters, a stop above the upper end of said center ejector member adapted to depress said member upon upward movement of said head, and a compressible spring between the upper end of said center ejector member and said second ejector member for actuating the latter member.

4. A punch of the character described comprising a slidable head, a cutter secured to the lower end of said head, a second cutter coaxial thereof and said collar.

CARL L. HALr/mAsT. 

